chapter 9 tabel 8

[ecvolt]

Refring to chapter 9 Tabel 8 conductor poperties a.one inch = 1000 mills and area in cmill=Dmills squared. If that is the case then 4/0 wire has a diameter of.528 inches 0r 528 mils.Then if i plug this into my formula A=Dm squared I get 528x528=278,784 circular mills however tabel 8 shows the crcular mills for 4/0 at 211,600 my number is closer to 300 kcmills what gives ???? Is it because the notes at the bottom of the page say coated strands ??

 

[don_resqcapt19]

When you use the OD of the conductor that number includes the spaces between the individual strands that make up the conductor.
Don

 

[bob]

1000 mills = 1 inch refers to a solid conductor. If you look at the conductor 1000 kcm you will see that the diameter is not 1 inch but 1.152 inches.